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Explore Git Internals with the JGit API

Have you ever wondered how a commit and its content is stored in Git? Well, I have, and I had some spare time over the last rainy weekend, so I did a little research. Because I feel ...
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Let’s Stream a Map in Java 8 with jOOλ

I wanted to find an easy way to stream a Map in Java 8. Guess what? There isn’t! What I would’ve expected for convenience is the following method:                   public ...
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Why to use String

Recently I was tutoring juniors during a training session. One of the task was to write a class that can dwarwle maps based on some string key. The result one of the juniors created ...
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Java Extension Mechanism Loads All JARs

The Java Extension Mechanism is described in the Java Tutorial as a “standard, scalable way to make custom APIs available to all applications running on the Java platform.” ...
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Supercharged jstack: How to Debug Your Servers at 100mph

A guide for using jstack to debug live Java production servers jstack is like U2 – it’s been with us since the dawn of time, and we can’t seem to be rid of it. Jokes aside, ...
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Revealing the length of Garbage Collection pauses

There are several ways to improve your product. One such way is to carefully track what your users are experiencing and improve based on that. We do apply this technique ourselves and ...
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Understanding strategy pattern by designing game of chess

Today we will try to understand Strategy Pattern with the help of an example. The example we will consider is The Game of Chess. The intention here is to explain strategy pattern and ...
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Java Tutorial Through Katas: Mars Rover

A programming kata is an exercise which helps a programmer hone his skills through practice and repetition. This article is part of the series Java Tutorial Through Katas. The article ...
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The dreaded DefaultAbstractHelperImpl

A while ago, we have published this fun game we like to call Spring API Bingo. It is a tribute and flattery to Spring’s immense creativeness when forming meaningful class names likeFactoryAdvisorAdapterHandlerLoader ContainerPreTranslatorInfoDisposable BeanFactoryDestinationResolver LocalPersistenceManagerFactoryBeanTwo ...
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AssertJ > Fest > Hamcrest

I have previously blogged about Hamcrest, and using its assertThat methods in preference to JUnit’s Assert. However, I quickly after discovered FEST Assertions, and happily switched ...
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